Biocomposites Based on Plasticized Wheat Flours: Effect of Bran Content on Thermomechanical Behavior.
作者： Franco Dominici , Francesca Luzi , Paolo Benincasa , Luigi Torre , Debora Puglia
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摘要: In the present work, effect of different bran content on overall thermomechanical behavior plasticized wheat flours (thermoplastic flour; TPWF) was investigated. Refined flour (F0) with negligible fiber content, F1 (whole grain flour, 20% wt. bran), F3 (50% bran) and F2 (F1:F3, 50:50) film samples were realized by extrusion process. The TPWF blending two biopolymers (polycaprolactone poly butyrate adipate terephthalate), combined presence citric acid as compatibilizer also considered. Results from FESEM analysis tensile characterization demonstrated that PCL able to reach improved compatibility fraction at intermediate (F2 based formulation) when 25% biopolymeric phase added. Additionally, it proved improvements can be achieved in both thermal mechanical performance higher shear rate (120 rpm) low temperature profiles (Tset2 = 130–135–140 °C) are selected. Disintegrability basic formulations compositing conditions within 21 days confirmed; same time, an absence any phytotoxic event compost itself registered. obtained results confirmed suitability these materials, adding contents, mechanically compete bioplastics using purified starches.
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